Well, of course Cameroon and Denmark had a lot to do with it as well. Both teams were keen on winning this one, which resulted in attractive open play. Both teams showed restraint, which resulted in very few cards.
Larrionda was all over the place, but never in the way and never calling much attention to himself. Very nice and low key. He didn't make any mistakes either as far as I could see. So, yeah, we should be seeing more of him this tournament. He will have a hard time keeping Baldassi from the final though...